[Faith gave us this product review as part of her application for the writer/editor positions. Comment away!]
The familiar balloon whisk, shaped like a teardrop, is better for use with rounded bowls and for aerating a mixture - cake batter, for instance, or egg whites.
IKEA has these (left) in paired bundles with a balloon whisk for $0.99, only available in stores.
For something a little fancier, try this Rosle Saucepan Whisk at Sur La Table for $16.